Add support for Lilygo T3S3 LR1121 1.2 Ghz mode (#145)

platformio.ini

@@ -350,6 +350,35 @@ build_flags =
 	-DLORA_RX=1
 	-DLORA_TX=0
 
+[env:lilygo-T3S3-v1-2-lr1121-1220]
+platform = espressif32
+board = t3_s3_v1_x
+framework = arduino
+upload_speed = 921600
+monitor_speed = 115200
+board_build.f_cpu = 240000000
+board_build.filesystem = littlefs
+lib_deps = 
+	ropg/Heltec_ESP32_LoRa_v3@^0.9.1
+	RadioLib
+	U8g2
+	XPowersLib
+	ESP32Async/AsyncTCP
+	ESP32Async/ESPAsyncWebServer
+build_flags = 
+	-DLILYGO
+	-DT3_S3_V1_2_LR1121
+	-DARDUINO_LILYGO_T3S3_LR1121
+	-DESP32
+    -DSAMPLES_RSSI=5
+	-DUSING_LR1121
+    -DFREQ_BEGIN=830
+	-DFREQ_END=1220
+	-DARDUINO_ARCH_ESP32
+	-DARDUINO_USB_CDC_ON_BOOT=1
+	-DARDUINO_LILYGO_T3_S3_V1_X
+	-DARDUINO_USB_MODE=1
+
 [env:heltec-v3-900-radio-rx]
 platform = espressif32
 board = heltec_wifi_lora_32_V3